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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright 2011 Sandia Corporation
// SPDX-License-Identifier: LicenseRef-BSD-3-Clause-Sandia-USGov
/**
* @class vtkPDescriptiveStatistics
* @brief A class for parallel univariate descriptive statistics
*
* vtkPDescriptiveStatistics is vtkDescriptiveStatistics subclass for parallel datasets.
* It learns and derives the global statistical model on each node, but assesses each
* individual data points on the node that owns it.
*
* @note Kurtosis formula in "Formulas for robust, one-pass parallel computation
* of covariances and Arbitrary-Order Statistical Moments", P. Pébay, 2008, has an error
* (equation 1.6 in the paper). A correct formula can be found in
* "Formulas for the Computation of Higher-
* Order Central Moments", P. Pébay, T.B. Terriberry, H. Kolla, J. Bennett, 2016, at equation 3.6.
* The latter one is being used to compute the 4th moment from partial ones across ranks.
*
* @par Thanks:
* Thanks to Philippe Pebay from Sandia National Laboratories for implementing this class.
*/
#ifndef vtkPDescriptiveStatistics_h
#define vtkPDescriptiveStatistics_h
#include "vtkDescriptiveStatistics.h"
#include "vtkFiltersParallelStatisticsModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkMultiBlockDataSet;
class vtkMultiProcessController;
class VTKFILTERSPARALLELSTATISTICS_EXPORT vtkPDescriptiveStatistics
: public vtkDescriptiveStatistics
{
public:
static vtkPDescriptiveStatistics* New();
vtkTypeMacro(vtkPDescriptiveStatistics, vtkDescriptiveStatistics);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Get/Set the multiprocess controller. If no controller is set,
* single process is assumed.
*/
virtual void SetController(vtkMultiProcessController*);
vtkGetObjectMacro(Controller, vtkMultiProcessController);
///@}
/**
* Execute the parallel calculations required by the Learn option.
*/
void Learn(vtkTable* inData, vtkTable* inParameters, vtkMultiBlockDataSet* outMeta) override;
protected:
vtkPDescriptiveStatistics();
~vtkPDescriptiveStatistics() override;
vtkMultiProcessController* Controller;
private:
vtkPDescriptiveStatistics(const vtkPDescriptiveStatistics&) = delete;
void operator=(const vtkPDescriptiveStatistics&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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